diff --git a/README.rst b/README.rst
index 93857ec..1ead694 100644
--- a/README.rst
+++ b/README.rst
@@ -66,7 +66,7 @@ Requirements
 
   * Python 3.x, version 3.3 or later.
 
-  The script tries to use a Python interpreter called ``python`` in
+  The script tries to use a Python interpreter called ``python3`` in
   your ``PATH``.  If your Python interpreter has a different name or
   is not in your ``PATH``, please adjust the first line of the script
   accordingly.
diff --git a/git-imerge b/git-imerge
index 743fa24..f90b769 100755
--- a/git-imerge
+++ b/git-imerge
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 # -*- coding: utf-8 -*-
 
 # Copyright 2012-2013 Michael Haggerty <mhagger@alum.mit.edu>